Biology 11-30-15 1st entry task for Chapter 7 – The cell Learning objective: How homeostasis maintains an internal stable environment Entry task: Go to page 214 in your book. Read about homeostasis, what do unicellular organisms do to maintain homeostasis?

Today’s plan Checking chapter 2 test results Studying homeostasis Comparing Prokaryotes and eukaryotes

Homeostasis (homeo_=same _stasis=standing still) Unicellular organisms as well as cells in multicellular organisms must maintain homeostasis, or that is to say, relatively constant physical or chemical conditions.

To maintain homeostasis Unicellular organisms Grow Respond to environment reproduce Multicellular organisms Have specialized cells that communicate with each other

Homeostasis Maintaining a constant internal environment How does your body do this? It uses a process called FEEDBACK 2 types of feedback are Negative – works to maintain a baseline level ex. Your every day stuff like maintaining temperature Positive – works to push way passed a baseline level ex. Rarer events like child birth

Examples of Homeostasis in humans Thermoregulation Glucose regulation https://www.youtube.com/watch?v=CLv3SkF_Eag https://www.youtube.com/watch?v=QKT47A-LBj4

Biology 12-1-15 2nd entry task for Chapter 7 – The cell Learning objective: Main organelles and their function Compare and contrast eukaryotic and prokaryotic cells Entry task: What are organelles? Do you remember some of the organelles found in cells? Write them down

Today’s plan Comparing Prokaryotes and eukaryotes Prokaryotic and eukaryotic Cells POGIL

On the white board, work with your group Compare and Contrast On the white board, work with your group to fill out this Venn diagram (page 194) Eukaryotes Prokaryotes

Compare and Contrast Prokaryotes Eukaryotes Nucleus No nucleus Smaller Nucleus Endoplasmic reticulum Golgi apparatus Lysosomes Vacuoles Mitochondria Cytoskeleton Cell membrane Ribosomes Cytoplasm

Eukaryotic vs. prokaryotic cells Lacks a nucleus Lacks organelles 1-10 micrometers Appeared earlier in the fossil record Contains nucleus Many organelles present 10-100 micrometers Appeared later in the fossil record

Two Basic types Prokaryote Eukaryote Cell membrane cytoplasm nucleus Eukaryote Cell organelles

Biology 12-2-15 3rdEntry task for Chapter 7 – The cell Learning objective: Main organelles and their function Difference between Animal cell and plant cell Entry task: What is the main characteristic that differentiates a prokaryote cell from a eukaryote cell? What is the organelle in plant cells that animal cells do not have?

Today’s plan Finish Prokaryotic and eukaryotic Cells POGIL Main cell organelles and their function

Main cell parts and functions

Cytoplasm: holds organelles - transport medium

Nucleus: Control center – contains the DNA (genetic material)

Ribosomes: make proteins

Ribosome

RER: modify and transport proteins

SER: Production of lipids (fats)

What is the difference between the rough ER and the smooth ER?

Golgi apparatus: Process and package proteins and lipids

Chloroplast: Where photosynthesis occurs – Converts sun energy into chemical energy (glucose)

Mitochondria: converts chemic energy stored in foods into compounds that the cell can use

Lysosome: Breaks down organelles that are not longer usefull

Biology 12-3-15 4th Entry task for Chapter 7 – The cell Learning objective: How substances move across the cell membrane Entry task: The cell membrane is referred as being selectively permeable, what do you think that means?

Today’s plan Main cell organelles and their function Cell membrane structure and function Diffusion POGIL

Cell Membrane Composed of proteins and a type of lipid called phospholipid The structure that makes the plasma membrane is called the phospholipid bilayer http://www.wisc-online.com/Objects/construction-of-the-cell-membrane/

Phospholipid molecule of Plasma Membrane

Plasma Membrane Structure

Biology 12-4-15 5th Entry task for Chapter 7 – The cell Learning objective: How substances move across the cell membrane Entry task: Why is the cell membrane important to the cell?

Today’s plan Finish Diffusion POGIL, and go over questions Cell Quiz Study questions

Diffusion The net movement of particles of a substance from where they are more concentrated to where they are less concentrated

Diffusion The random movement of molecules from a high concentration to a low concentration If system is left alone the molecules will eventually spread themselves equally every where – the molecules do not stop moving through

What happens to a red blood cell when it is placed in water with different concentrations of solute?

Results of water movement on cells – Osmotic Pressure

Biology 12-7-15 6th Entry task for Chapter 7 – The cell Please get a book! Learning objective: How substances move across the cell membrane Entry task: Explain what Is happening in this diagram

Today’s plan Different types of transport across the cell membrane jigsaw activity Cell transport quiz

Types of transport across the cell membrane You will be assigned an specific type of across the cell membrane transport Study your assigned transport for 7 minutes (page 208- 213) You will move to an expert group next, where you will discuss how to prepare a presentation to explain your assigned transport (FILLOUT THE CORRESPONDING INFORMATION ON THE HANDOUT) You can search for animations online or draw a diagram on the whiteboards provided After 15 minutes, you will move back to your original groups where all experts will present their transport type to entire group. AS YOU LISTEN TO THE PRESENTATIONS, FILLOUT THE HANDOUT PROVIDED BY YOUR TEACHER

A diagram that explains the type of transport On your handout you will get the following information for each of the different cell transports presented and for the one you are an expert on: A diagram that explains the type of transport Any special characteristics of your type of transport -What makes it different from the other types The overall movement of particles that takes place Whether or not energy is required and WHY Pages 208-213

EXIT TICKET In a half piece of paper, write your name date and period and answer the following question: What is the difference between passive and active transport? Write an example of each

Biology 12-8-15 7th Entry task for Chapter 7 – The cell Please get a book! Learning objective: Levels of organization in biology Entry task: Explain the main difference between active and passive transport. In terms of particle movement and energy required https://www.youtube.com/watch?v=kfy92hdaAH0

Today’s plan Finish Different types of transport across the cell Sections 7.3 and 7.4 questions

Cell Specialization In multicellular organisms there is a division of labor among the specialized cells

Levels of Organization cell organ system tissue organ organism

After you have finished the graphic organizers, work on the 7 After you have finished the graphic organizers, work on the 7.3 assessment questions (1 a, b, c, and 2 a, b, c. Page 213). write these in your notebook/journal. Do questions 2-3 from Analyzing Data section (page 216), after reading section 7.4 (pages 214-216)

Biology 12-9-15 8th Entry task for Chapter 7 – The cell Please get a book! Learning objective: Levels of organization in biology Entry task: Explain how thermoregulation is an example of homeostasis and a negative feedback https://www.youtube.com/watch?v=kfy92hdaAH0

Today’s plan Dialysis tubbing as a model of a cell membrane

Examples of Homeostasis in humans Thermoregulation Glucose regulation https://www.youtube.com/watch?v=CLv3SkF_Eag https://www.youtube.com/watch?v=QKT47A-LBj4

Biology 12-10-15 9th Entry task for Chapter 7 – The cell Learning objective: Check your knowledge for chapter 7 Entry task: Place in order from simpler to more complex Tissue organ cell organism

Today’s plan Chapter 7 test Get results and finish ‘diffusion lab questions